sysdeps/mach/hurd/Makefile

   1 # Copyright (C) 1993-2020 Free Software Foundation, Inc.
   2 # This file is part of the GNU C Library.
   3
   4 # The GNU C Library is free software; you can redistribute it and/or
   5 # modify it under the terms of the GNU Lesser General Public
   6 # License as published by the Free Software Foundation; either
   7 # version 2.1 of the License, or (at your option) any later version.
   8
   9 # The GNU C Library is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 # Lesser General Public License for more details.
  13
  14 # You should have received a copy of the GNU Lesser General Public
  15 # License along with the GNU C Library; if not, see
  16 # <https://www.gnu.org/licenses/>.
  17
  18 ifdef in-Makerules
  19
  20 # Look for header files in hurd/ under the top-level library source directory.
  21 # Look for generated header files where they get created.
  22 includes += -I$(..)hurd -I$(common-objpfx)hurd/
  23
  24 # We use the style `if (err = call(...))' a lot in the Hurd code,
  25 # where we have a lot of functions that return zero or an errno code.
  26 +cflags += -Wno-parentheses
  27
  28 # Do not use any assembly code from sysdeps/unix (and subdirectories).
  29 # This bypasses all the system call stubs and uses any existing posix or
  30 # generic C files instead.
  31 inhibit-sysdep-asm += unix.*
  32 inhibit-unix-syscalls = yes
  33
  34 # Don't try to generate anything from the installed Unix system and its
  35 # libraries.  That is only of use when building for a Unix system, so as to
  36 # be compatible with some existing binaries for that system.
  37 inhibit-glue = yes
  38
  39 ifeq (,$(filter mach hurd,$(subdir)))
  40 # Subdirectories other than hurd/ might use the generated Hurd headers.
  41 # So make sure we get a chance to run in hurd/ to make them before all else.
  42 # (But we don't want to do this in mach/, because hurd/ needs some things
  43 # there, and we know mach/ doesn't need anything from hurd/.)
  44
  45 hurd-objpfx = $(common-objpfx)hurd/
  46
  47 # These are all the generated headers that <hurd.h> includes.
  48 before-compile += $(patsubst %,$(hurd-objpfx)hurd/%.h,auth io fs process)
  49 $(patsubst %,$(hurd-objpfx)hurd/%.h,auth io fs process): hurd-before-compile
  50 .PHONY: hurd-before-compile
  51 hurd-before-compile: $(common-objpfx)mach/mach-shortcuts.h
  52         $(MAKE) -C $(..)hurd subdir=hurd before-compile no_deps=t
  53 endif
  54
  55 # Hurd profil.c includes this file, so give a rule to make it.
  56 ifeq ($(subdir),gmon)
  57 $(common-objpfx)hurd/../mach/RPC_task_get_sampled_pcs.c:
  58         $(MAKE) -C $(..)mach subdir=mach before-compile no_deps=t
  59 endif
  60
  61 \f
  62 # Generate bits/errno.h from the section of the manual that lists all the errno
  63 # codes.
  64
  65 errno.texinfo = $(..)manual/errno.texi
  66
  67 hurd = $(..)sysdeps/mach/hurd
  68
  69 define mach-errno-h
  70 ($(foreach h,mach/message.h \
  71              mach/kern_return.h \
  72              mach/mig_errors.h \
  73              device/device_types.h,\
  74  echo '#include <$h>';\
  75  ))
  76 endef
  77
  78 # We use the compiler to generate a list of absolute file names for
  79 # the headers we want to search for Mach error codes, listed above (and
  80 # incidentally, all other headers those include).
  81 -include $(common-objpfx)errnos.d
  82 $(common-objpfx)errnos.d: $(mach-errnos-deps)
  83         $(mach-errno-h) | \
  84         $(CC) $(CFLAGS) \
  85             $(subst -include $(common-objpfx)libc-modules.h,,$(CPPFLAGS)) \
  86             -M -x c - | \
  87         sed $(sed-remove-objpfx) -e 's,- *:,mach-errnos-deps :=,' \
  88             -e 's, \.\./, $(..),g' > $@t
  89         mv -f $@t $@
  90
  91 $(hurd)/bits/errno.h: $(common-objpfx)stamp-errnos ;
  92 $(common-objpfx)stamp-errnos: $(hurd)/errnos.awk $(errno.texinfo) \
  93                               $(mach-errnos-deps) $(common-objpfx)errnos.d
  94         mkdir -p $(hurd-objpfx)bits
  95         $(AWK) -f $^ > $(hurd-objpfx)bits/errno.h-tmp
  96 # Make it unwritable so noone will edit it by mistake.
  97         -chmod a-w $(hurd-objpfx)bits/errno.h-tmp
  98         $(move-if-change) $(hurd-objpfx)bits/errno.h-tmp $(hurd)/bits/errno.h
  99         touch $@
 100
 101 common-generated += errnos.d stamp-errnos
 102 \f
 103 # We install the real libc.a as libcrt.a and as libc.a we install a linker
 104 # script which does -( -lcrt -lmachuser -lhurduser -).
 105
 106 libc-name = crt
 107
 108 ifeq (,$(subdir))
 109 install-others += $(inst_libdir)/libc.a
 110 $(inst_libdir)/libc.a: $(hurd)/libc-ldscript $(+force); $(do-install)
 111 ifeq (yes,$(build-profile))
 112 install-others += $(inst_libdir)/libc_p.a
 113 $(inst_libdir)/libc_p.a: $(hurd)/libc_p-ldscript $(+force); $(do-install)
 114 endif
 115 endif
 116
 117 # Make sure these are used to build the libc.so shared object too.  There
 118 # is a circular dependency between each of these shared objects and libc
 119 # (many high-level libc functions call stubs, stubs call low-level libc
 120 # functions like memcpy and mach_msg).  This works out fine at run time
 121 # (all the objects are loaded before resolving their symbols, so these
 122 # interdependencies are fine).  But to create the shared objects we must
 123 # link them one at a time; since each needs one or both of the others to
 124 # produce its DT_NEEDED entries and to assign its undefined symbols the
 125 # right symbol versions, we can't do any of them before the others!  To
 126 # get around this, we link each lib*user.so shared object twice.  First,
 127 # we link an object without reference to libc.so (since we haven't linked
 128 # libc.so yet), so it lacks a DT_NEEDED record for the libc soname it
 129 # depends on, and its undefined symbol references lack the symbol version
 130 # assignments they should have.  We will use this shared object solely to
 131 # link libc.so against it; that gives libc.so the proper DT_NEEDED record,
 132 # and symbol versions assignments (if the lib*user.so object is using them).
 133 # Finally we link a second version of the same lib*user.so shared object,
 134 # this time linked normally against libc so it gets a proper DT_NEEDED
 135 # record and symbol version set; this one can be installed for run-time use.
 136 rpcuserlibs := $(common-objpfx)mach/libmachuser.so \
 137                $(common-objpfx)hurd/libhurduser.so
 138 link-rpcuserlibs := $(rpcuserlibs:%user.so=%user-link.so)
 139 $(common-objpfx)libc.so: $(link-rpcuserlibs)
 140 $(common-objpfx)linkobj/libc.so: $(link-rpcuserlibs)
 141 rpath-dirs += mach hurd
 142
 143 # Make sure the `lib' pass builds the dummy shared objects so
 144 # we can link libc against them.
 145 ifeq (mach,$(subdir))
 146 lib-noranlib: $(common-objpfx)mach/libmachuser-link.so
 147 endif
 148 ifeq (hurd,$(subdir))
 149 lib-noranlib: $(common-objpfx)hurd/libhurduser-link.so
 150 endif
 151
 152 $(link-rpcuserlibs): %-link.so: %_pic.a
 153 # These shared objects are just for the purpose of linking libc,
 154 # so they don't need abi-note.o linked into them.
 155         $(build-shlib-helper) \
 156                 -nostdlib -o $@ \
 157                 -Wl,-soname=$(*F).so$($(*F).so-version) \
 158                 $(build-shlib-objlist)
 159 libmachuser-link.so-no-z-defs = yes
 160 libhurduser-link.so-no-z-defs = yes
 161
 162 # And get them into the libc.so ldscript.
 163 $(inst_libdir)/libc.so: $(rpcuserlibs)
 164
 165 # The RPC stubs from these libraries are needed in building the dynamic
 166 # linker, too.  It must be self-contained, so we link the needed PIC
 167 # objects directly into the shared object.
 168 ifeq (elf,$(subdir))
 169 $(objpfx)librtld.map: $(rpcuserlibs:.so=_pic.a)
 170
 171 CFLAGS-dl-load.c = -DEXTERNAL_MAP_FROM_FD
 172 endif
 173
 174 # Override the generic Makeconfig values so we link against the RPC libs.
 175 link-libc-static := -Wl,--start-group \
 176                     $(patsubst %,$(common-objpfx)%.a,\
 177                                libc mach/libmachuser hurd/libhurduser) \
 178                     $(static-gnulib) -Wl,--end-group
 179 link-libc-static-tests := -Wl,--start-group \
 180                     $(patsubst %,$(common-objpfx)%.a,\
 181                                libc mach/libmachuser hurd/libhurduser) \
 182                     $(static-gnulib-tests) -Wl,--end-group
 183 \f
 184 ifeq ($(subdir),csu)
 185
 186 extra-objs += static-start.o
 187
 188 # We need special startup code for statically linked binaries.
 189 $(objpfx)crt0.o: $(objpfx)static-start.o $(objpfx)abi-note.o $(objpfx)init.o
 190         $(link-relocatable)
 191
 192 endif
 193 \f
 194 ifeq (hurd, $(subdir))
 195 sysdep_routines += cthreads
 196 endif
 197
 198 ifeq (io, $(subdir))
 199 sysdep_routines += f_setlk close_nocancel_nostatus
 200 endif
 201
 202 ifeq ($(subdir),sunrpc)
 203 sysdep_headers += nfs/nfs.h
 204 endif
 205
 206 ifeq ($(subdir),socket)
 207 sysdep_headers += net/ethernet.h net/if_arp.h net/if_ether.h net/route.h
 208 endif
 209
 210 ifeq ($(subdir),nis)
 211 CFLAGS-ypclnt.c += -DUSE_BINDINGDIR=1
 212 endif
 213
 214 LDLIBS-pthread.so += $(objdir)/hurd/libhurduser.so
 215
 216 endif   # in-Makerules